Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The arrival of May brings a temperature shift, with the average high-temperature escalating from a chilly 46.6°F (8.1°C) in April to a moderate 59.2°F (15.1°C). May presents a pronounced divergence from daily peak temperatures, with the average low-temperature of 33.4°F (0.8°C).Humidity
The average relative humidity in May is 67%.Rainfall
In May, the rain falls for 6.3 days. Throughout May, 0.28" (7mm) of precipitation is accumulated. In Greenough, during the entire year, the rain falls for 46.4 days and collects up to 2.4" (61mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Greenough, during May, snow falls for 0.5 days and regularly aggregates up to 0.16" (4mm) of snow. In Greenough, during the entire year, snow falls for 31.4 days and aggregates up to 7.64" (194mm) of snow.Daylight
In Greenough, the average length of the day in May is 15h and 5min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:44 pm. On the last day of May, sunrise is at 5:42 am and sunset at 9:20 pm MDT.
Sunshine
The average sunshine in May in Greenough is 10.9h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 in May translates into these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Enhance your sun protection with tightly woven, yet airy clothing. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How many days does it rain in May in Greenough?
How many days does it snow in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Greenough have in May?
How high is the UV index in May?
Average temperature in May
Greenough, MT
- Average high temperature in May: 59.2°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.1°F).
- Average low temperature in May: 33.4°F
The months with the highest average low temperature are July and August (45.5°F).
The coldest month (with the lowest average low temperature) is December (12.2°F).
Average pressure in May
Greenough, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Greenough, MT
- Average wind speed in May: 5.4mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in May
Greenough, MT
- Average humidity in May: 67%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in May
Greenough, MT
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is June (0.43").
The driest month (with the least rainfall) is December (0.08").
Average rainfall days in May
Greenough, MT
- Average rainfall days in May: 6.3 days
The month with the highest number of rainy days is April (6.8 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in May
Greenough, MT
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Greenough, MT
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is February (5.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Greenough, MT
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in May
Greenough, MT
- Average sunshine days in May: 23 days
The month with the most sunshine days is July (27 days).
The month with the least sunshine days is April (21.9 days).
Average UV index in May
Greenough, MT
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Greenough, MT
- Average cloud cover in May: 30
The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in May
Greenough, MT
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Greenough, Montana, USA
Weather forecast for your location
2. Allow the app to use your location